Door lock



Aug. 20, 1940.

w. s. EDWARDS I 2,212,316

DOOR LOCK Filed July 17, 1939 2 Sheets-Sheet l W. S; EDWARDS DOOR LOCK Filed July 1'7, 1939 Aug. 20, 1940'.

2 Sheets-Sheet 2 Patented Aug. 20, 1940 PATENT OFFICE noon LooK William S. Edwards, Hamden, Conn, assignor to Sargent & Company, New Haven, Conn, a corporation of Connecticut Application July 17, 1939, serial No. 284,813 10 Claims. (01. 70-92) This "invention relates 'to door locks, and more particularly to a lock adapted to be applied to the door of a public building,,and designed for use in connection with a so-called panic bar, which normally lies across the inner face of the door in such a manner that persons crowding against the same will automatically release the latch and allow the door to swing open. It will be understood, however, that while my improvements may be particularly adapted, generally speaking, for a lock of this type, certain features of my invention are applicable'to' and useful in looks or latches of other types. g I 2 In connection with 'so-called panic bar locks, the bolts are in some instances pivoted adjacent the face plate of the lock so that when released by depression of the panic bar, for example, the bolt will roll or swing inwardly by pressure against the strike plate, and permit the door to I open without the bolt being'positively retracted by a sliding movement within the lock case. In some instances people did not understand the operation of these locks, and when upon depression of the panic bar a positive retraction of the bolt did not occur, it was sometimes felt that the lock-Was not in proper working order,notwithstanding the fact that the bolt was released so that it would swing pivotally by contact with the strike plate so as to permit the door to open readily;

The present invention has particularly to do with a lock of the pivoted bolt type, and has for its object the provision of mechanism whereby the bolt is not only released for a pivotal swinging movement when an opening pressure is put upon the door, but the bolt is also by depressionof the panic bar positively moved to retracted position so that its operation can be readily seen. It will, of course, be understood that this positive retraction of the bolt bythe panic bar is not absolutely'essential to the opening of the door, for when the bolt is released it will swing upon its pivot and beretracted by contact with the strike.

Another object of the invention is the provision of improved operating mechanism for a so-called panic bar lock.

Another object of the invention is the provision of improved means whereby actuation of an operating member will both release the bolt for swinging movement upon its pivot and positively retract it by a sliding movement within the lock case. i

I To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

hereinafter more fully described.

In the accompanying drawings:

Fig. 1 is an edge elevational view of a portion of a door provided with my improved lock;

Fig. 2 is a side elevational view of the parts shown in Fig. 1; 5 Fig. 3 is a View of the lock with the cover of the case removed to show the interior mechanism;

Fig. 4 is a view similar to Fig, 3 with the parts in the position assumed when the door is closed, some of the mechanism having been removed for 10 the sake of clearness;

Fig. 5 is a view similar to Fig. 4 showing'the parts in the position assumed when the door is closed and the bolt is retracted;

Fig. 6 is a sectional view on line 66 of Fig. 4; 15

Fig. '7 is a view similar to Fig. 6 showing the bolt when moved about its pivotal connection with the case;

Fig. 8 is a detail view of the bolt-operating slide actuated from the interior of the door; and

Fig. 9 is a view of an associated slide designed to be operated from the exterior of the door.

Fig. 10 is a view in elevation of the retracting slide for the dog-controlling plunger and latch bolt. 25

In order to illustrate a preferred embodiment of my invention I have shown a door ID equipped with a lock of the type known as a mortise lock and having a case I I and a face plate l2 designed to lie substantially flush with the edge of the 30 door, which face plate is provided with openings [3 and I4 through which project a'dog-controlling plunger 15 and a bolt [6 of the beveled or latch bolt type. Upon the inside of the door I have shown anescutcheon plate'l'l to which is 35 pivoted at IS a panic bar IS, the latter being provided with a finger 20 projecting below the lock case to actuate the bolt-operating slide, as will be The bolt I6 is provided with a'stem 2|, the stem 40 being pivoted to the bolt head at 22, as shown more particularly in Fig. 6. A spring 23 surrounds the stem and acts against posts 24 of the case at its rear end, and against a washer 25 secured on the stem 2| at its front end so as to urge the bolt to protracted position. At its rear grid the stem is provided with the usual crosshead It will be noted from Fig. 6, for example, that upon each side of the bolt are provided projecting 50 trunnions 21 (only one of which is shown'in the drawings), these trunnions being slidab-ly mounted upon lugs 28 at each side of the bolt. It will be understood that these trunnions permit the bolt to swing or. pivot upon the lugs 28, as 55 shown, for example, in Fig. 7, this pivotal motion being permitted relatively to the stem 2|. by means of the pivotal connection between the bolt and stem, as shown at 22.

The bolt is controlled by means of a slide, shown more particularly in Figs. 3 and 8, and designated generally by the numeral 30. This slide has a lower portion 3| extending to the bottom of the case, the lower surface 32 of which portion is exposed through an opening 33 at the bottom of the case, so that it may be contacted by the operating finger 20 of the panic bar IS. The slide 30 also is provided with an inwardly projecting part 34, which, as shown in Fig, 4, lies behind the crosshead 26 when the slide is in its lowermost position to dog the stem 2| against retraction and thereby dog the bolt in protracted position.

A latch-retracting lever 35 is pivoted in the case at 36, the upper free end of which lever lies in front of the crosshead 26 so as to retract the stem 21 and bolt to in a sliding movement when this lever is actuated. The lever 35 is provided with a projection 3'! adapted to be contacted by a lug 38 at the lower end of the slide 30, so that when this slide is raised by the finger 20, for example, the lever 35 will be swung about its pivot in a direction to retract the bolt stem 2|. The slide 30 is ordinarily maintained in its lower position by means of a spring 39, shown in Fig. 3.

The latch bolt is also adapted to be released and withdrawn by means at the outside of the door, such, for example, as the knob 46. Thisv knob may operate, through means which forms no part of the present invention and which it is therefore not necessary to show, an arm 4| (Figs. 3, 4 and 5), which rests below an auxiliary slide 42 mounted in the case adjacent the slide 36. The slide 42 is held in its lower position by the spring 43, and carries upon its rear face, as shown in Fig. 9, a lug 44 adapted to engage in the recess #35 on the slide 33, so as to raise the latter slide when the auxiliary slide 42 is raised.

The dog-controlling plunger [5 is, as shown in Figs. 4 and 5, provided with a stem 46 slidable between posts 4! fixed inthe case, and is provided with a rear crosshead 48. A spring 49 acts in the usual manner to maintain this plunger in its protracted position. When in its protracted position, as shown in Fig. 3, for example, the crosshead 43 engages the rear face of a depending lever 5!) pivoted at 5! within the case, so as to urge this lever to the left, as shown in this figure. The lower end of the lever 50 engages the upper end of a bell crank lever 52 pivoted at 53 to the case, the other end of which bell crank lever engages below a projection 54 on the slide 30, whereby when the lever 59 and dog-controlling plunger are in the position shown in Fig. 3, the bell crank lever 52 is rocked slightly about its pivot in a counterclockwise direction, thus raising theslide 36 so that the projection 34 clears the crosshead 26. This is the position occupied by the parts when the door is open, and if it is closed in the usual manner, the beveled bolt [6 is cammed into the case by contact with the strike.

When the door is closed the parts are in the position shown in Fig. 4, from which it will be seen that the dog-controlling plunger l5 has been swung inwardly about its pivot by contactwith the strike While the latch bolt I6 is projected into the strike opening. In this position the crosshead 48 is moved away from the lever 50, and

thus allows the spring 39' to move the slide 30 downwardly, keeping the upper end of the bell crank lever52 against the lower end of the lever open without making use of the 50. In this position the projecting portion 34 of the slide 20 stands behind the crosshead 26 of the latch bolt stem 2|, so that the latch bolt may not be cammed rearwardly into the case. It will be noticed that the lower end of the slide 30 is in.

this position of the parts in its lowermost position, resting against the finger 20.

If it is desired to open the door, the panic bar I 9 may be depressed, which raises the slide 30 and carries the part 34 upwardly to a position where it no longer blocks the inward movement of the crosshead 26. This raising of the slide 36 at once frees the bolt l6 for swinging movement about I tact with the strike, sothat the door is freeto pivotal arrangement of this bolt.

The dog-controlling plunger I5 is pivoted adjacent the rear side of the face plate I2 by means of trunnions 55, which trunnions are normally held in recesses 56 provided at the rear of the face plate by the finger 51 on a lever 58 pivoted to the case at 59 and urged in a counter-clockwise direction by the spring 60 (Fig. 3). It is desirable to be able to lock the plunger l5 and the bolt i6 inretracted position at-times, so that the door will swing open and shut freely without use of the panic bar I}! or knob 40. This is arranged by means of a slide 65 mounted within the case, the slide carrying a tumbler 66 and having a talon 61, designed to be engaged by the rollback 68, so that the slide may be moved forwardly and rearwardly within the case,- and maintained in either its forward or rearward position by the engagement of the tumbler 66 with abutments 69 and 10, shown more especially in Figs. 4 and 5. The slide 65 carries a depending finger H retract the bolt 86, and adjacent its front end is provided with a shoulder 72 which acts against the crosshead 48 to withdraw the plunger I5. Preferably the roll back 68 will be operated by which acts against the crosshead 26 to means at the inside of the door such as a lock 14 or a thumb turn if the latter is desired. It may also be noted that the finger H in the extreme forward position of the slide 65, stands above the ation of the knob 40 at the outside of the door.

It will also be understood that a. key-operated lock 15 may be provided atthe outside of the door, which look will have a rollback standing in a position similar to but spaced slightly in front of the roll back 68, which may be operated to act upon the lug 16 at the upper end of the slide 30 to raise this, slide and thereby release or withdraw, or both release and withdraw, the bolt l6.

It will be seen that I have provided a panic bar lock of verysimple construction, but having all of the operations and advantages of the usual lock of this character. In addition it will be.

tion of this bolt within the lock case by depression of the same panic bar without the use of mechanism of any great complication.

While I have shown and described a preferred embodiment of my invention, it will be understood that it'is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim is:

1. In combination, a lock case, a latch bolt slidably mounted therein, said bolt also having a pivotal connection with the case, a stem connected to the bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, a slide movably mounted in the case, said slide having a part normally standing in the path of said stem to dog the bolt against movement, and means actuated by the movement of said slide to slidably retract the bolt into the case after said dog has been moved out of the path of the stem.

2. In combination, a lock case, a latch bolt slidably mounted therein, said bolt also having a pivotal connection with the case, a stem connected to the bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, a slide movably mounted in the case and having a part normally dogging the stem against movement, and a latch-retracting lever pivotally mounted in the case and adapted to be moved by said slide to positively retract the latch into the case.

3. In combination, a lock case, a latch bolt slidably mounted therein, said bolt also having a pivotal connection with the case, a stem connected to the bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, a slide movably mounted in the case and having a part normally dogging the stem against movement, a latch-retracting lever pivotally mounted in the case and adapted to be moved by said slide to positively retract the latch bolt into the case, and means pivoted to the door on the outside thereof to actuate said slideto release said dogging means and thereafter slidably retract the bolt.

4. In combination, a lock case, a latch bolt slidably mounted in the case and also having a pivotal connection with the case, means to dog said bolt against movement, a bolt-retracting lever movably mounted in the case, a slide upon which said dogging means is mounted, and means connecting said lever and slide whereby the former is actuated by the latter to slidably retract the bolt after release of the bolt from said dogging means.

5. In combination, a lock case, a latch bolt slidably mounted in the case and also having a pivotal connection with the case, means to dog said bolt against movement, a bolt-retracting lever movably mounted in the case, a slide upon which said dogging means is mounted, means connecting said lever and slide whereby the former is actuated by the latter to slidably retract the bolt after release of the bolt from said dogging means, and key-operated means to actuate said slide.

6. In combination, a lock case, a latch bolt slidably mounted in the case and also having a pivotal connection with the case, a stem connected to the latch bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, means to dog said stem against movement, means mounted in the case to release said dogging means to permit movement of the bolt, means movably mounted in the case to engage said stem and slidably retract the bolt, and a single member to operate both said releasing means and said actuating means.

7. In combination, a lock case, a latch bolt slidably mounted therein, said bolt also having a pivotal connection with the case, a stem connected to the bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, a member movably mounted in the case having a part normally standing in the path of the stem to dog the bolt against movement, and means actuated by said member to slidably retract the bolt into the case after said dog has been moved out of the path of the stem.

8. In combination, a lock case, a. latch boltslidably mounted therein, said bolt also having a pivotal connection with the case, a stem connected to the bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, a member movably mounted in the case to dog said stem in position to prevent retraction of the 'bolt, means operated, by said member to slidably retract the bolt and means to actuate said dogging member.

9. In combination, a lock case, a latch bolt slidably mounted therein, said bolt also having a. pivotal connection with the case, a stem connected to the bolt and slidably mounted in the case to control both slidable and pivotal movements of the bolt, a member movably mounted in the case provided with means to dog said stem in position to hold the bolt protracted, a lever mounted in the case and actuated by said member to engage said stem and slidably retract the bolt, means mounting said lever to provide a lost-motion connection between it and said mem ber whereby the dogging member is moved prior to said lever and means to actuate said dogging member.

10. In combination, a lock case, a latch bolt mounted therein for movement to protracted and retracted positions, a stem connected to the bolt and slidably mounted in the case, a dogging member movably mounted in the case and adapted to engage said stem to hold the bolt in protracted position, a latch-retracting lever actuated by the movement of said dogging member to engage the stem and move the bolt to retracted position and means to operate said dogging member.

WILLIAM S. EDWARDS. 

